1 | // io_ex1.cpp ----------------------------------------------------------// |
2 | |
3 | // Copyright 2010 Howard Hinnant |
4 | // Copyright 2010 Vicente J. Botet Escriba |
5 | |
6 | // Distributed under the Boost Software License, Version 1.0. |
7 | // See http://www.boost.org/LICENSE_1_0.txt |
8 | |
9 | /* |
10 | This code was adapted by Vicente J. Botet Escriba from Hinnant's html documentation. |
11 | Many thanks to Howard for making his code available under the Boost license. |
12 | |
13 | */ |
14 | |
15 | #include <boost/chrono/chrono_io.hpp> |
16 | #include <ostream> |
17 | #include <iostream> |
18 | |
19 | // format duration as [-]d/hh::mm::ss.cc |
20 | template <class CharT, class Traits, class Rep, class Period> |
21 | std::basic_ostream<CharT, Traits>& |
22 | display(std::basic_ostream<CharT, Traits>& os, |
23 | boost::chrono::duration<Rep, Period> d) |
24 | { |
25 | using std::cout; |
26 | using namespace boost; |
27 | using namespace boost::chrono; |
28 | |
29 | typedef duration<long long, ratio<86400> > days; |
30 | typedef duration<long long, centi> centiseconds; |
31 | |
32 | // if negative, print negative sign and negate |
33 | if (d < duration<Rep, Period>(0)) |
34 | { |
35 | d = -d; |
36 | os << '-'; |
37 | } |
38 | // round d to nearest centiseconds, to even on tie |
39 | centiseconds cs = duration_cast<centiseconds>(d); |
40 | if (d - cs > milliseconds(5) |
41 | || (d - cs == milliseconds(5) && cs.count() & 1)) |
42 | ++cs; |
43 | // separate seconds from centiseconds |
44 | seconds s = duration_cast<seconds>(fd: cs); |
45 | cs -= s; |
46 | // separate minutes from seconds |
47 | minutes m = duration_cast<minutes>(fd: s); |
48 | s -= m; |
49 | // separate hours from minutes |
50 | hours h = duration_cast<hours>(fd: m); |
51 | m -= h; |
52 | // separate days from hours |
53 | days dy = duration_cast<days>(fd: h); |
54 | h -= dy; |
55 | // print d/hh:mm:ss.cc |
56 | os << dy.count() << '/'; |
57 | if (h < hours(10)) |
58 | os << '0'; |
59 | os << h.count() << ':'; |
60 | if (m < minutes(10)) |
61 | os << '0'; |
62 | os << m.count() << ':'; |
63 | if (s < seconds(10)) |
64 | os << '0'; |
65 | os << s.count() << '.'; |
66 | if (cs < centiseconds(10)) |
67 | os << '0'; |
68 | os << cs.count(); |
69 | return os; |
70 | } |
71 | |
72 | int main() |
73 | { |
74 | using std::cout; |
75 | using namespace boost; |
76 | using namespace boost::chrono; |
77 | |
78 | #ifdef BOOST_CHRONO_HAS_CLOCK_STEADY |
79 | display(os&: cout, d: steady_clock::now().time_since_epoch() |
80 | + duration<long, mega>(1)) << '\n'; |
81 | #endif |
82 | display(os&: cout, d: -milliseconds(6)) << '\n'; |
83 | display(os&: cout, d: duration<long, mega>(1)) << '\n'; |
84 | display(os&: cout, d: -duration<long, mega>(1)) << '\n'; |
85 | } |
86 | |
87 | //~ 12/06:03:22.95 |
88 | //~ -0/00:00:00.01 |
89 | //~ 11/13:46:40.00 |
90 | //~ -11/13:46:40.00 |
91 | |